Heterocyclic monoacylacetyl bodies and process of making same



Patented Aug. 3, 19 2 6,

ARTHUR, zrrsoimn, or oFrENBAcH-oir-TnE-MAIN, GERMANY, ASSIGNOR TO I; G.

rARB'ENmDUs'rRIE IAKTIENGESELLSCHAFT, or FRANKFORT-ON- THE-MAIN, GER- HETEROGYCLIC MONOAOYLACETYL BODIES AND rnodnssoF-MAKiNG SAME.

No Drawing. Application filed June '7, 1923, Serial No. 644,064, and in Germany May 3, 1923.

My inventionrelates to new monoacylacetyl bodies of the general formula} Y-CO CH -'CO-.NH-R-X R', I wherein Y represents any radicle'of the hydrocarbon series containing at least one and not more thansix carbon atoms, R and R the same or difierent aryl residues, X a residue, of a five membered heterocyclic nucleus, united with one of the aryl residues with one bond, while the other aryl residue has two carbon atoms in. common with the heterocyclic nucleus under this term being r included atom complexes such as I include'aliphatic as wellaromatic radicles.

The new compoundsare obtained by heating acetoacetic acid ester or its homologes or analoges such *as benzoylacetic acid ester with bases corresponding to the formula above mentioned, such as e. g. aminosubsti-' 2 tuted phenylbenzothiazols, phenylbenzimid- I azols, ph'enyl-pseudo-aziminobenzenes and others, preferably in a solvent or diluent.

' The aminosubstituted phenylbenzothiazols have the formula:

' Aminophdnyl 0 The aminosubstituted phenylben zimida'zols have the formula;

minobenzenes have theiformula: 1

Aminophenyl The new compounds may be used a's'priaryl residue has man products'for the manufacture of 'dyestuffs, they "possess 1n a surprising manner the oharacter of a substantive body'making" possible their fixation alkaline solution and the development with diazo compounds to valuable shades, fast to washing? The following example illustrates the invention, the parts beingby weight, and all,

temperatures ln ce'ntigrade degrees. I

- Example. A solution of parts of dehydrothiotoluidin in parts of acetoacetio acid ester 1s poured while stirring into naphthalene,

which is heated to 180. The mixture is held at about 180, until tl, Under the definition given above for Y (not corrected) insoluble in ether formula:

It is soluble in on-the cotton-fiber in I Crystallized crystalline k The said product, monoacetoacetyldehydrothiotoluidin,-has the 4 With other bases 'and'other acylacetic acid esters,-suohfas benzoylacetic acid ester the process may ner.

Letters Patent is the following :1

1. As new articles monoacylacetyl bodies of the general formula: a

wherein Y represents any radicle of the hydrocarbon series containing at least one and not more thansix carbon atoms, R and R aryl residues, X a residue of a five membered heterocyclio nucleus, aryl residues with one bond, while the other monswith theheterocyclic nucleus, which are wh 'en dry colorless to feebly coloredcrystalsoluble in diluted causticsoda line powders, solution. v I 2. A process of making new monoacylunited with one of the.

two carbon atoms in commule:

acetyl bodies consisting in heating acylacetic acid esters with bases of the general forwhereinR andR rep resent aryl residues, X aresidue of a five membered heterocyclic nucleus, united-With one of the aryl residues with one bond, While the, other 'aryl residue has two carbon atoms in'c'ommon with the heterocyclic nucleus. v g

l 3; As a new article monoacetoacetyldehydrothiotoluidin of the ormula:

which is when drfi line owder, solu solution.

4. A process of making monoacetoacetyl- 1c in dilute caustic soda.

' dehydrothiotoluidin consisting in heating acetoacetic acid ester with dehydrothiotoluidin. v

5.- A process of making monoacetoacetyldehydrothiotoluidin which consists in heatingzacetoacetic acid ester with dehydrothiotoluidin, in a diluent.

In testimony, that I claim the foregoing as my invention,

ARTHUR ZiITS'CHER a feebly colored crystal- I have signed my name, this 23d day of May, 1923. i 

